Lock.



PATENTED MAR. 10, 1903. B.IPHELPS.

LOCK. APPLwATIoN FILED SB'PT. 2s, 190i.

N0 MODEL.

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UNITED STATES PATENT OFFICE.

BYRON PHELPS, OF SEATTLE, WASHINGTON.

LOCK.

SPECIFCATION forming part of Letters Patent No. 722,622, dated March 10,1903.

Application iiled September 23, 1901. Serial No. 76,313. (No model.)

To (LM whom, it nung concern.: I

Beit known that I, BYRON PHELPS, a citizen of the United States,residing at Seattle, in the county of King and State of Washingtomhaveinvented a new and useful Lock, of which the following is aspecification.

My invention relates to locks of a general construction, such as showniu a former patent of mine, No. 63l,434,dated August 22, 1899 g and myobject is to provide a simple and improved locking mechanism, also toprovide an improved latch mechanism.

Other desirable objects are attained which are obvious to one skilled inthe art.

Figure l is a plan view. Fig. -2 is a side View of detached portions.Fig. 3 is a detail.

A is a frame having extensions B B. These extensions are in the form ofsleeves and provide suitable bearings for an innerspindle O and an outerspindle C'.

D is a knob carried by the inner spindle O, and D is a knob carried bythe outer spindle C. The spindle C carries a roll-back E, while spindleC carries a roll-back E.

F is a yoke having a shank F and connected to a latch G. Roll-backs E E'are normally in engagement with the yoke F and are adapted to actuatethe yoke when a knob is turned.

I have provided the following improved mechanism whereby the latch G maybe swung in flush with the frame without moving or disturbing any of themechanism of the lock.

The shank F has an elongated slot F2.

G is a pin carried by the latch G and which projects into the slot F2.

F3 is a pin carried by the shank F.

F4 is a spring interposed between pin F3 and latch G.

F5 is a spring preferably stronger than spring F4 and interposed betweenpin F3 and the frame A.

Vhen the door is being closed, the latchbolt G rubs against the strike(not shown) and is moved in, compressing the spring F4, but not movingthe shank F', which is held in place by the heavier spring F5. When,however, the shank is drawn in by turninga knob, the pin Fs compressesthe spring F5, which when the knob is released restores the shank toposition.

If desired, a single spring could be used in place of the two shown andcould be separated by the pin F3 into two parts, one of which might havemore coils than the other, thus giving a stronger pressure on one sideof the pin F3 and a lighter pressure on the other side, which would givethe same effect as the employment of springs of dierent strengths.

H is a rock-shaft pivoted to the frame A and having an arm H and a noseH2.

H3 is a ilat spring which bears against the nose H2 and serves to holdthe shaft in its extreme positions. l

l J is a reach-rod one end of which is supported by being pivotallyconnected to the arm H.

K is a pin carried by the rod J and which is slidably mounted in theframe A:

L/is an opening in the spindle G and adapted to receive the pin K whenthe spindle C is rotated so as to bring the opening L into alinementwith the pin K.

M is a key mechanism in the outer knob D.

M' is a key mechanism in the inner knob D.

N is a keyrod extending from the key mechanism M, to which it isattached, through the spindle C. A similar key-rod N extends Vfrom keymechanism Ml through spindle O.

From'the end of key-rod N projects an eccentrically-locat'ed pin O. Asimilar pin O projects from rod N.

P is a notch in one end of the reach-rod J.

Q is an extension from reach-rod J, which plays back and forth in aguide-hole R in the frame A and helps to guide the movement of thereach-rod J.

The spindle C may be locked from either side of the door by means of akey. Thus assume that a key is inserted in key mechanism M and turned,the rod N turns and its pin O sweeps around, (turning clockwise in Fig.2,) enters the notch P and moves the reach-rod J to the left and with itthe pin K, which enters the hole L in spindle C, thus locking the same.The parts are then in the position shown in dotted lines, Fig. 2. Thepin O operates in precisely the same manner to lock the spindle C whenthe key is used in key mechanism M.

It will be seen from-the foregoing that the mechanism can only beoperated by a key,

IOO

that the key can operate through either knob, and that the outside knobmay be locked Without locking the inner knob. Therefore this form oflock is particularly adapted for use in public buildings, churches, duc.For instance, the janitor may lock the outer knob and leave the buildingwithout danger of imprisoning any person Who may be left inside. Thoseinside may turn the knob to operate the latch to open the door, butpersons cannot enter from the outside unless provided With a key, as theouter knob is locked. Moreover, it is impossible to disturb the properWorking of the mechanism, as there are no finger-pieces or buttons orthe like to tamper with. This makes the lock particularly desirable forthe purpose mentioned. Obviously7 in unlocking the spindle C the partsmove in a reverse direction.

I do notldesire to limit myself to the specitic construction shown, asmany changes may be made Without departing from the spirit of theinvention.

l. A frame, a latch-bolt, an outer and an inner spindle, latch mechanismconnecting said bolt and spindles, a-locking-pin slidably mounted insaid frame, said outer spindle having means adapted to engage said pin,and key mechanism in each of said spindles engaging with meansforamoving said pin.

2. A frame, a latch-bolt, an outer and an inner spindle, latch mechanismconnecting said bolt and spindles, a locking-pin slidably mounted insaid frame, an opening in said outer spindle to receive said pin, andkey mechanism operating through either of said spindles to actuate saidpin. I

3. A frame, a latch-bolt and outer and inner spindles connected withmechanism to operate said latch-bolt, one of said spindles having a holetherein, a reach-rod having a pin, said pin being slidably mounted insaid frame, and a key mechanism operating through either of saidspindles to move said reach-rod and pin transversely of said spindlesand cause said pin to enter said hole.

4. A frame, a latch-bolt, latch mechanism, an outer spindle, an innerspindle, said outer spindle having a transverse hole therein, areach-rod having a locking-pin thereon, said pin being slidably mountedin said frame, said reach-rod having a notch, a plurality of key-rodseach having an eccentric-pin adapted to enter said notch and move saidreach-rod.

5. A frame, a latch-bolt, a shank, means for operating said shank, theend of said shank having a slot, a pin on said latch-bolt lying in saidslot, a spring-retaining means on said shank, a spring extended betweensaid springretaining means and said latch-bolt, and a spring betweensaid spring-retaining means and a part of said frame, one of saidsprings being stronger than the other.

6. A frame, a latch-bolt, latch mechanism, an outer spindle, an innerspindle, said outer spindle having a transverse hole therein, areach-rod, a locking-pin thereon, said reachrod having a notch, aplurality of key-rods each having an eccentric-pin adapted to enter saidnotch and move said reach-rod, a rock-arm connected to one end of saidreachrods, the other end of said reach-rod having an extension slidablymounted in said frame.

Signed at New Britain, Connecticut, this 23d day of August, 1901.

BYRON PHELPS.

Witnesses:

C. A. BLAIR, G. E. Roo'r.

